*,*::before,*::after{box-sizing:border-box}
:root{
  --bg:#0B0D10; --bg2:#121417; --card:#16191E; --line:#23272E;
  --ink:#F2F5F7; --ink2:#A6B0BB; --ink3:#6F7B87;
  --teal:#21CECC; --orange:#FE5723;
  --maxw:1080px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",
    "Noto Sans","Noto Sans SC","Noto Sans JP","Noto Sans KR","Noto Sans Thai",Arial,sans-serif;
}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(11,13,16,.82);
  backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:650;letter-spacing:-.01em;
  color:var(--ink);font-size:1.05rem}
.brand:hover{text-decoration:none}
.brand img{width:30px;height:30px;border-radius:8px}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:22px;font-size:.92rem}
.nav-links a{color:var(--ink2)}
.nav-links a:hover{color:var(--ink);text-decoration:none}

/* language switcher: <details> so it needs no script */
.lang{position:relative}
.lang summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:7px;
  padding:7px 12px;border:1px solid var(--line);border-radius:999px;
  color:var(--ink2);font-size:.87rem;white-space:nowrap}
.lang summary::-webkit-details-marker{display:none}
.lang summary:hover{color:var(--ink);border-color:#31363F}
.lang[open] summary{color:var(--ink);border-color:#31363F}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);background:var(--card);
  border:1px solid var(--line);border-radius:14px;padding:8px;min-width:196px;
  box-shadow:0 24px 60px rgba(0,0,0,.55);max-height:70vh;overflow-y:auto}
.lang-menu a{display:block;padding:8px 12px;border-radius:9px;color:var(--ink2);font-size:.9rem}
.lang-menu a:hover{background:#1D2127;color:var(--ink);text-decoration:none}
.lang-menu a[aria-current]{color:var(--teal);font-weight:600}

/* ---------- hero ---------- */
.hero{position:relative;padding:96px 0 88px;text-align:center;overflow:hidden}
.hero::before{content:"";position:absolute;left:50%;top:-260px;width:900px;height:900px;
  transform:translateX(-50%);pointer-events:none;
  background:radial-gradient(circle,rgba(33,206,204,.20),rgba(33,206,204,0) 62%)}
.hero::after{content:"";position:absolute;left:50%;top:120px;width:620px;height:620px;
  transform:translateX(-50%);pointer-events:none;
  background:radial-gradient(circle,rgba(254,87,35,.13),rgba(254,87,35,0) 66%)}
.hero>*{position:relative;z-index:1}
.hero-icon{width:112px;height:112px;margin:0 auto 30px;border-radius:26px;
  box-shadow:0 30px 70px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.07)}
.badge{display:inline-block;padding:6px 14px;border-radius:999px;font-size:.8rem;
  letter-spacing:.01em;color:var(--teal);background:rgba(33,206,204,.10);
  border:1px solid rgba(33,206,204,.28);margin-bottom:22px}
h1{font-size:clamp(2.3rem,6vw,4rem);line-height:1.07;letter-spacing:-.03em;
  font-weight:700;margin:0 0 20px}
h1 .grad{background:linear-gradient(100deg,var(--teal),#7BE3C8 45%,var(--orange));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lede{max-width:620px;margin:0 auto;color:var(--ink2);font-size:clamp(1.02rem,1.7vw,1.2rem)}
.cta{margin-top:36px;display:flex;flex-direction:column;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 26px;border-radius:999px;
  background:var(--ink);color:#0B0D10;font-weight:640;font-size:1rem}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn.soon{background:transparent;color:var(--ink2);border:1px solid var(--line);cursor:default}
.btn.soon:hover{transform:none}
.cta small{color:var(--ink3);font-size:.85rem}

/* ---------- sections ---------- */
section{padding:80px 0;border-top:1px solid var(--line)}
.sec-head{max-width:660px;margin:0 auto 52px;text-align:center}
h2{font-size:clamp(1.6rem,3.4vw,2.3rem);line-height:1.2;letter-spacing:-.02em;
  font-weight:680;margin:0 0 14px}
.sec-head p{color:var(--ink2);margin:0}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(272px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px}
.card .ico{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  margin-bottom:16px;background:rgba(33,206,204,.11);border:1px solid rgba(33,206,204,.22)}
.card .ico svg{width:21px;height:21px;stroke:var(--teal);fill:none;stroke-width:1.9;
  stroke-linecap:round;stroke-linejoin:round}
.card h3{margin:0 0 8px;font-size:1.08rem;font-weight:640;letter-spacing:-.01em}
.card p{margin:0;color:var(--ink2);font-size:.95rem}

.steps{counter-reset:s;display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}
.step{position:relative;padding:28px;background:var(--card);
  border:1px solid var(--line);border-radius:18px}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;
  width:32px;height:32px;border-radius:10px;margin-bottom:15px;
  background:linear-gradient(140deg,var(--teal),var(--orange));color:#0B0D10;
  font-weight:700;font-size:.95rem}
.step h3{margin:0 0 8px;font-size:1.05rem;font-weight:640}
.step p{margin:0;color:var(--ink2);font-size:.95rem}

.notes{max-width:720px;margin:0 auto;padding:0;list-style:none}
.notes li{position:relative;padding:0 0 0 30px;margin-bottom:14px;color:var(--ink2)}
.notes li::before{content:"";position:absolute;left:6px;top:.62em;width:7px;height:7px;
  border-radius:50%;background:var(--teal)}
.notes li strong{color:var(--ink);font-weight:620}

/* ---------- legal ---------- */
.doc{max-width:760px;margin:0 auto;padding:64px 24px 88px}
.doc h1{font-size:clamp(1.85rem,4.2vw,2.5rem);text-align:left;margin-bottom:10px}
.doc .updated{color:var(--ink3);font-size:.88rem;margin:0 0 14px}
.doc .intro{color:var(--ink2);padding:20px 22px;background:var(--card);
  border:1px solid var(--line);border-left:3px solid var(--teal);
  border-radius:0 14px 14px 0;margin:0 0 40px}
.doc h2{font-size:1.22rem;margin:44px 0 12px;letter-spacing:-.01em;font-weight:650}
.doc p,.doc li{color:var(--ink2)}
.doc p{margin:0 0 14px}
.doc ul{margin:0 0 14px;padding-left:22px}
.doc li{margin-bottom:8px}
.doc strong{color:var(--ink);font-weight:620}
.doc code{background:var(--card);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;font-size:.9em}
.tblwrap{overflow-x:auto;margin:0 0 18px;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;font-size:.92rem;min-width:460px}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
th{color:var(--ink);font-weight:620;background:#13161A;white-space:nowrap}
td{color:var(--ink2)}
tr:last-child td{border-bottom:none}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:52px 0 64px;color:var(--ink3);font-size:.9rem}
.foot{display:flex;flex-wrap:wrap;gap:26px;align-items:center}
.foot .fbrand{display:flex;align-items:center;gap:10px;color:var(--ink2)}
.foot .fbrand img{width:26px;height:26px;border-radius:7px}
.foot nav{margin-left:auto;display:flex;flex-wrap:wrap;gap:22px}
.foot nav a{color:var(--ink3)}
.foot nav a:hover{color:var(--ink2);text-decoration:none}
.foot .copy{width:100%;color:#556069;font-size:.84rem}

/* Thai and Vietnamese stack diacritics above and below the letter, so the
   tight display line-height collides with the line above. */
html[lang="th"] h1{line-height:1.34}
html[lang="th"] h2,html[lang="th"] .doc h1{line-height:1.42}
html[lang="vi"] h1{line-height:1.2}
html[lang="vi"] h2{line-height:1.3}

@media (max-width:640px){
  .hero{padding:64px 0 60px}
  section{padding:60px 0}
  .nav{height:58px;gap:10px}
  .nav-links{gap:14px;font-size:.86rem}
  .nav-links .hide-sm{display:none}
  .doc{padding:44px 20px 68px}
}
@media (prefers-reduced-motion:reduce){.btn:hover{transform:none}}